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PyPy — How can it possibly beat CPython?
... of Python that can be translated by PyPy's translation framework". But in order to be translated, RPython code has to be statically typed (the types are inferred, you don't declare them, but it's still strictly one type per variable), and you can't do things like declaring/modifying functions/class...
Asynchronous shell exec in PHP
...verted to use echo "sudo command" | at now and commenting www-data out in /etc/at.deny
– Julien
Apr 16 '15 at 7:47
@Ju...
T-SQL CASE Clause: How to specify WHEN NULL
... for null, and can be verified even in SQL Server by using case statements etc.)
SELECT NULL = NULL -- Results in NULL
SELECT NULL <> NULL -- Results in NULL
So there is no true/false answer to the question, instead the answer is also null.
This has many implications, for example in
CAS...
Android AlertDialog Single Button
...tDialog.Builder(this);
builder.setMessage("Look at this dialog!")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//do things
}
});
AlertDialog aler...
How to debug Lock wait timeout exceeded on MySQL?
...-----+-------+
1 row in set (0.01 sec)
You can set it to higher value in /etc/my.cnf permanently with this line
[mysqld]
innodb_lock_wait_timeout=120
and restart mysql. If you cannot restart mysql at this time, run this:
SET GLOBAL innodb_lock_wait_timeout = 120;
You could also just set it for t...
The application may be doing too much work on its main thread
... all the times. But if the number of frames skipped and large
and in the order of 300+ then there can be some serious trouble with
your code. Android devices come in a vast array of hardware unlike ios
and windows devices. The RAM and CPU varies and if you want a
reasonable performance and u...
Remove Server Response Header IIS7
... IIS sends 304 Not Modified header for static files (css / less / images / etc) as this does not reach the ASP.NET pipeline, so in this situation Server: Microsoft IIS/7.5 is still rendered
– Jano
Jul 11 '14 at 1:07
...
Hibernate vs JPA vs JDO - pros and cons of each? [closed]
... datasources, db4o, hbase, ldap, bigtable, couchdb (plugins for cassandra) etc.
you can easily switch from an sql to non-sql datasource and vice-versa.
no proxy objects and therefore less pain with regards to hashcode() and equals() implementations
more POJO and hence less workarounds required
suppo...
Set default CRAN mirror permanent in R
...tilde expansion). If this variable is
unset, the default is R_HOME/etc/Rprofile.site, which is used if
it exists (which it does not in a 'factory-fresh' installation).
So do Sys.getenv("R_PROFILE") for the first option, or Sys.getenv("R_HOME") or R.home() for the second option. On m...
How do I choose between Tesseract and OpenCV? [closed]
... image inputs (a single word, line, paragraph, page, limited dictionaries, etc.).
OpenCV, on the other hand, is a computer vision library that includes features that let you perform some feature extraction and data classification. You can create a simple letter segmenter and classifier that performs...